No, they aren't. I don't mean to be hostile here, but I object strongly to the implicit assumption that 'tech' means "heavily Sandhill-funded software companies operating in the Valley".
I've worked at several software companies, some good, some bad. But I, like a very large portion of American 'tech' workers or even 'CS-degree bearing programmers', have never actually worked for a Silicon Valley company, much less one with major VC financing, much less one where VC culture has shaped everyone else's environment.
That's not to deny that there can be a very real issue here. But as an example, banking has similar serious issues at the top, and I wouldn't assume that every realtor's office, even ones ultimately tied to Merrill Lynch, had the same issues. Even if a realtor did have issues with sexism and discrimination, I think it would be unreasonable to assume that they came from what happened at the top carrying 'down the stack'.
I think it does a real disservice to 'tech' in general to understand it entirely in light of people like Travis Kalanick and Justin Caldbeck. I think it even does a disservice to efforts to fight sexism and harassment; the behavior of the richest and most powerful people in tech seems to have more in common with the rich and powerful of other industries than the rank-and-file of tech.
And I worry that this concept of trickle-down misbehavior will do exactly what the top comment points out - obscure everyday issues and opportunities in favor of a focus on a small group that's behaving quite differently, and can't be easily improved.
The nearest would likely have been when I worked with London "unicorn" Powa Technologies, and we all know how that went...
Perhaps. But those VCs and CEOs and COOs are your bosses. Just as engineering cannot be divorced from the effects of what is built,"tech" is hard to separate from it's own environment. And it appears that the same antics continue down the stack.